Exam 22: The Proteobacteria

In dissimilatory sulfate reduction by Desulfovibrio,electrons are passed out of the cell,where they are used to reduce sulfide completely to sulfate.

Nautiliaceae are chemolithoautotrophs from deep-sea _________ vent ecosystems

Species of the genus Hyphomicrobium are budding bacteria that attach to solid objects and are ______.

An organism that uses methane or methanol as its sole carbon and energy source is called a ______.

Filamentous microbial mats in anoxic,sulfide-rich cave springs are dominated by members of the ______.

Which of the following genera fix nitrogen nonsymbiotically?

Methylotrophic bacteria generate ATP by oxidizing methane to methanol then to formaldehyde,which is excreted.

Because of the similarity in cellular morphology among the Enterobacteriales,biochemical or genetic tests are needed for identification of particular genera and species.

Coxiella burnetii reproduces in the ______________ of a eukaryotic host cell.

Because of their environments and physiology,there is great interest in using members of the sulfate-reducing bacteria (SRB)Shewanella and Geobacter in bioremediation or to generate electricity in microbial fuel cells.

The enterobacteria in the order Enterobacteriales are readily distinguishable from one another by morphological criteria.

Sulfate- or sulfur-reducing bacteria (SRB)are united by their ability to reduce during anaerobic respiration.

Which of the following is recognized as a microbe capable of nitrification?

In general,the sulfate-reducing bacteria (SRB)can oxidize carbon substrates such as lactate,formate,butyrate,propionate,pyruvate,or aromatic compounds to acetate.

The causative agent of cholera in humans is a member of the genus ______.

Members of the genus Rhizobium,when growing symbiotically within root nodule cells,are referred to as ______.

Nitrifiers are chemolithoautotrophs that use either as electron donors in a process called nitrification.

Whooping cough is caused by ______.

The critical enzymatic virulence factor that helps allow Helicobacter pylori survive in the harsh acidic environment of the stomach is _______,which drives the local pH up. or

Of the can be used either as reductants for biosynthesis or be donated to the electron transport chain to reduce the terminal electron acceptor,oxygen.